초록 ▼

A solenoid valve for opening and closing a fluid passage formed therein by the movement of a movable core in which a coil is wound around a resin bobbin and a stator core is fixed at one end portion of a center hole of the bobbin. A magnetic path plate having a ring-shaped portion and a flanged port

A solenoid valve for opening and closing a fluid passage formed therein by the movement of a movable core in which a coil is wound around a resin bobbin and a stator core is fixed at one end portion of a center hole of the bobbin. A magnetic path plate having a ring-shaped portion and a flanged portion is insert-moulded in a body of the bobbin with a part of the flanged portion protruding radially to the outside of the body of the bobbin. The magnetic path plate is disposed such that the inner surface of the ring-shaped portion surrounds the outer surface of the moving core and the ring-shaped portion is concentric with the center hole of the bobbin. Since the protruding flanged portion is connected mechanically to one end of a yoke, a magnetic path is provided between the movable core and the yoke through the magnetic path plate with a reduced reluctance.

대표청구항 ▼

A solenoid valve for opening and closing a fluid passage formed therein comprising: a nonmagnetic bobbin having a body with a center hole and having fluid passage means, a coil wound around said bobbin, a stator core located in said center hole of said bobbin, a movable core movably positioned in sa

A solenoid valve for opening and closing a fluid passage formed therein comprising: a nonmagnetic bobbin having a body with a center hole and having fluid passage means, a coil wound around said bobbin, a stator core located in said center hole of said bobbin, a movable core movably positioned in said center hole of said bobbin for opening and closing said fluid passage means, spring means positioned between said stator core and said movable core for urging said movable core in a direction to separate said movable core from said stator core, magnetic path means having the greater part thereof insert-molded in the body of said bobbin and surrounding the outer surface of said movable core such that the inner surface of said magnetic path means and the outer surface of said movable core are in an opposed relationship with each other, said magnetic path means comprising a ring shaped portion and a flanged portion, said flanged portion being projected outwardly from the outer surface of said ring-shaped portion and having a part thereof further projected to the outside of said bobbin body, a cover formed to cover the periphery of said coil and fixed to said bobbin, and a yoke magnetically coupling said stator core and said magnetic path means.